Kd weston



(N0 ModeL) E. WESTON.

HOLDER FOR INGANDESGENT LAMPS. No. 320,030. Patented June 16, 1885.

HI WWW- EDVARD IVESTON, OF NE\VARK, NE\V JERSEY, ASSIGNOR TO THE UNITED STATES ELECTRIC LIGHTING COMPANY, OF NEXV YORK, N. Y.

HOLDER FOR INCANDESCENT LAMPS.

ESPECIPICATION forming part of Letters Patent No. 320,030, dated June 16, 1885.

Application filed July 18, 1884. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD Wnsrou, a subject of the Queen of Great Britain,and a resident of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Holders for Incandescent Lamps, of which the following is a specification, reference being had to the drawings accompanying and forming a part of the same.

In a patent granted to the United States Electric Lighting Company, as my assignee, May 6, 1884s, No. 298,142, I have shown and described a holder for incandescent lamps. In the case referred to an incandescent lamp globe is provided with projections or lugs on the neck or base. The socket is a cylindrical case with flanged rim, in which are cut notches, and the terminal contacts are springs that force. the lamp upward and secure it in place when the lamp is in the holder.

My present invention is an improvement on the holder referred to, and its object is to make the lamp more easy to insert in the holder and to simplify and cheapen the construction of the holder. These improvements being in details of construction, may be best explained by reference to the accompanying drawings, in which- Figure 1 is a side elevation of the lamp and holder; Fig. 2, a part vertical sectional View of the lamp base and socket; Fig. 3, a side elevation of the lamp-base and a plan view of the end of the same; and Fig. 4 is atop view of the socket.

The base of the lamp A is made with a cylindrical open neck, B, into which is inserted a cork or plug, C. Through this, or down its sides, are carried the wires 1) D that sup port the carbon-conductor within the globe. Around the base or cylindrical neck B is a cylinder of sheet metal, E, preferably brass, which is fixed to the neck by asmall quantity of a suitable cement, such as plaster-of-paris. The cylinder E may be quite thin, and only a small quantity of plaster is required to unite it to the neck, so that the diameter of the lat ter will be but slightly increased by its pres ence. Two lugs, to a, project from the metal cylinder E, and an interior flange, b, is formed near the end of the cylinder by indenting the metal. The end of the cylinder E is closed by a plug, F, havinga central projection, G. The circuit-wires are carried one, as D, through this plug near its rim, the other, D, down 5 5 through the projection or thicker portion G, and are secured to an annular metal plate, 6, and a metal cap or plate, f, respectively. The socket S is made of sheet metalgenerally brassand is secured to a base provided with So means for attaching it to a bracket or chandelier. In the lower portion of the socket is the switch controlled by the key K, and above this is placed a recessed block, H, of insulating material with a central perforation, g. 65 To the under side of block H is secured a terminal spring-plate, L, that normally covers the perforation 9. To the upper side is secured an arcshaped terminal spring, M, that partly surrounds the perforation g. In 70 the upper part of the sheet-metal socket is spun a bead, N, and the metal is cut away at two points, m, and indented at n. This completes the holder. In use the neck of the lamp is introduced into the sockct, the projection 7 5 G extending down through the block H. The lamp is then brought to a position in which the lugs or pins a a enter the notches m, when it is turned to carry the pins through the bead N until they reach the indentations n. 80 The plate f is now in contact with spring L, which is forced downward, and the annular platcGs in contact with spring M. By this means not only is good contact assured, but the lamp is held firmly in its socket. It may 55 be turned in either direction without difficulty and without injury to the connections.

\Vhile my invention is limited to specific improvements on the mechanical construction of the holder described in my patent referred to, it is not confined to the exact construction of parts herein shownas, for instance, I regard as in great measure immaterial the shape or design of the holder as a whole, or the manner in which the bead or flange m for locking 5 the cylinder and lamp in place may be formed.

The essential feature of my invention is, as will appear from the above description, that the internal diameter of the socket shall be so little greater than the diameter of the cylin- 10o drical sheet-metal base of the lamp that the base fits snugly and closely in the socket. This makes not only a more compact and smaller holder, but one in which the lamp is held more firmly and into which it is more readily inserted. In this respect it differs from the form shown in my patent referred to, in which the socket has a flange turned'inward and is of considerably greater diameter than the lamp-base.

Of the features of construction which I have described, those which 1 now claim as my invention are summarized in the following claims- 1. The combination, with an incandescent electric-lamp globe having a cylindrical neck, a metal cylinder secured around the neck and provided with pins or lugs, a plug ofinsulating, material closing the end of said cylinder, and contact-terminals secured thereto, of a socket for receiving the cylinder, the said socket being of such diameter that the cylinder fits closely therein and constructed to re tain the same by engaging with the lugs or pins, substantially as set forth.

2. The combination, with an incandescent electriclamp globe having a cylindrical neck, a metal cylinder secured around theneck and provided with pinsor lugs, a plug of insulating material closing the end of said cylinder, and contact-terminals secured thereto, of a socket for receiving the cylinder, the said socket being of such diameter that the cylinder fits closely therein, circuit-terminal springs secured within the socket, and means, substantially as described, for retaining the eylinder in the socket against the force of said springs.

3. The combination, with the lamp having an open cylindrical neck, the sheet-metal cylinder E, with pins a a secured to the same, the plug F, having an extension, G, and circuit-terminals secured to the plug, of a metallic socket, S, of such diameter that the cylinder E fits closely therein, and having a flange or bead, N, with notches cut therein, the perforated block H of insulating material, and

spring-contacts secured thereto, substantially as described.

- 4. The combination, with the lamp having an open cylindrical base or neck, the sheetmetal cylinder E, with pins a secured to the same, the plug 0 in the neck of the lamp, the

plug F, having an extension, G, and circuit terminals secured to the plug, of the sheetmetal socket S, of such diameter that the cylinderEfits closelytherein,andhavingafiangcd or beaded top with notches m cut therein, the perforated insulating-block H, and springcontacts secured to the opposite sides of the same, as and for the purpose specified.

In testimony whereof I have hereunto set my I hand this 16th day of July, 1884.

EDWVARD \VESTON.

Witnesses:

FRANK N. CRANE, O. F. GREIM. 

